/usr/lib/python3/dist-packages/defcon/objects/image.py is in python3-defcon 0.3.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import weakref
from defcon.objects.base import BaseDictObject
from defcon.objects.color import Color
_defaultTransformation = {
"xScale" : 1,
"xyScale" : 0,
"yxScale" : 0,
"yScale" : 1,
"xOffset" : 0,
"yOffset" : 0
}
class Image(BaseDictObject):
"""
This object represents an image reference in a glyph.
**This object posts the following notifications:**
===========================
Name
===========================
Image.Changed
Image.FileNameChanged
Image.TransformationChanged
Image.ColorChanged
Image.ImageDataChanged
===========================
During initialization an image dictionary, following the format defined
in the UFO spec, can be passed. If so, the new object will be populated
with the data from the dictionary.
"""
changeNotificationName = "Image.Changed"
representationFactories = {}
def __init__(self, glyph=None, imageDict=None):
self._font = None
self._layerSet = None
self._layer = None
self._glyph = None
self.glyph = glyph
super(Image, self).__init__()
self.beginSelfNotificationObservation()
self["fileName"] = None
self["color"] = None
if imageDict is not None:
self.update(imageDict)
for key, value in _defaultTransformation.items():
if self.get(key) is None:
self[key] = value
self._dirty = False
def __len__(self):
# this is a little hack for glifLib writing.
# when a GLIF is written, glyph.image is chekced with:
# if glyph.image:
# fileName is required, so if that isn't defined
# return 0. this tells glifLib to skip the image.
if self["fileName"] is None:
return 0
return super(Image, self).__len__()
# --------------
# Parent Objects
# --------------
def getParent(self):
return self.glyph
def _get_font(self):
font = None
if self._font is None:
glyph = self.glyph
if glyph is not None:
font = glyph.font
if font is not None:
self._font = weakref.ref(font)
else:
font = self._font()
return font
font = property(_get_font, doc="The :class:`Font` that this image belongs to.")
def _get_layerSet(self):
layerSet = None
if self._layerSet is None:
glyph = self.glyph
if glyph is not None:
layerSet = glyph.layerSet
if layerSet is not None:
self._layerSet = weakref.ref(layerSet)
else:
layerSet = self._layerSet()
return layerSet
layerSet = property(_get_layerSet, doc="The :class:`LayerSet` that this image belongs to.")
def _get_layer(self):
layer = None
if self._layer is None:
glyph = self.glyph
if glyph is not None:
layer = glyph.layer
if layer is not None:
self._layer = weakref.ref(layer)
else:
layer = self._layer()
return layer
layer = property(_get_layer, doc="The :class:`Layer` that this image belongs to.")
def _get_glyph(self):
if self._glyph is None:
return None
return self._glyph()
def _set_glyph(self, glyph):
assert self._glyph is None
if glyph is not None:
glyph = weakref.ref(glyph)
self._font = None
self._layerSet = None
self._layer = None
self._glyph = glyph
glyph = property(_get_glyph, _set_glyph, doc="The :class:`Glyph` that this image belongs to. This should not be set externally.")
# ----------
# Attributes
# ----------
# file name
def _get_fileName(self):
return self["fileName"]
def _set_fileName(self, fileName):
oldFileName = self.get("fileName")
if fileName == oldFileName:
return
self["fileName"] = fileName
self.postNotification("Image.FileNameChanged", data=dict(oldValue=oldFileName, newValue=fileName))
fileName = property(_get_fileName, _set_fileName, doc="The file name the image. Setting this will posts *Image.Changed* and *Image.FileNameChanged* notifications.")
# transformation
def _get_transformation(self):
if "xScale" not in self:
return
return (self["xScale"], self["xyScale"], self["yxScale"], self["yScale"], self["xOffset"], self["yOffset"])
def _set_transformation(self, transformation):
oldTransformation = self.transformation
if oldTransformation == transformation:
return
xScale, xyScale, yxScale, yScale, xOffset, yOffset = transformation
# hold the notifications so that only one is sent out
self.holdNotifications()
self["xScale"] = xScale
self["xyScale"] = xyScale
self["yxScale"] = yxScale
self["yScale"] = yScale
self["xOffset"] = xOffset
self["yOffset"] = yOffset
self.releaseHeldNotifications()
self.postNotification("Image.TransformationChanged", data=dict(oldValue=oldTransformation, newValue=transformation))
transformation = property(_get_transformation, _set_transformation, doc="The transformation matrix for the image. Setting this will posts *Image.Changed* and *Image.TransformationChanged* notifications.")
# color
def _get_color(self):
return self.get("color")
def _set_color(self, color):
if color is None:
newColor = None
else:
newColor = Color(color)
oldColor = self.get("color")
if newColor == oldColor:
return
self["color"] = newColor
self.postNotification("Image.ColorChanged", data=dict(oldValue=oldColor, newValue=newColor))
color = property(_get_color, _set_color, doc="The image's :class:`Color` object. When setting, the value can be a UFO color string, a sequence of (r, g, b, a) or a :class:`Color` object. Setting this posts *Image.ColorChanged* and *Image.Changed* notifications.")
# ----
# Move
# ----
def move(self, values):
"""
Move the image by **(x, y)**.
This posts *Image.Changed* and *Image.TransformationChanged* notifications.
"""
xOffset, yOffset = values
if not (xOffset or yOffset):
return
oldTransformation = self.transformation
self.holdNotifications()
self["xOffset"] += xOffset
self["yOffset"] += yOffset
self.releaseHeldNotifications()
self.postNotification("Image.TransformationChanged", data=dict(oldValue=oldTransformation, newValue=self.transformation))
# ------------------------
# Notification Observation
# ------------------------
def beginSelfNotificationObservation(self):
super(Image, self).beginSelfNotificationObservation()
self.beginSelfImageSetNotificationObservation()
def endSelfNotificationObservation(self):
self.endImageSetNotificationObservation()
super(Image, self).endSelfNotificationObservation()
self._font = None
self._layerSet = None
self._layer = None
self._glyph = None
def beginSelfImageSetNotificationObservation(self):
font = self.font
if font is None:
return
imageSet = font.images
imageSet.addObserver(self, "imageSetImageAddedNotificationCallback", "ImageSet.ImageAdded")
imageSet.addObserver(self, "imageSetImageDeletedNotificationCallback", "ImageSet.ImageDeleted")
imageSet.addObserver(self, "imageSetImageChangedNotificationCallback", "ImageSet.ImageChanged")
layer = self.layer
layer.addObserver(self, "layerColorChangedNotificationCallback", "Layer.ColorChanged")
def endImageSetNotificationObservation(self):
font = self.font
if font is None:
return
imageSet = font.images
imageSet.removeObserver(self, "ImageSet.ImageAdded")
imageSet.removeObserver(self, "ImageSet.ImageDeleted")
imageSet.removeObserver(self, "ImageSet.ImageChanged")
layer = self.layer
layer.removeObserver(self, "Layer.ColorChanged")
def imageSetImageAddedNotificationCallback(self, notification):
name = notification.data["name"]
if name != self.fileName:
return
self.postNotification("Image.ImageDataChanged")
def imageSetImageDeletedNotificationCallback(self, notification):
name = notification.data["name"]
if name != self.fileName:
return
self.postNotification("Image.ImageDataChanged")
def imageSetImageChangedNotificationCallback(self, notification):
name = notification.data["name"]
if name != self.fileName:
return
self.postNotification("Image.ImageDataChanged")
def layerColorChangedNotificationCallback(self, notification):
if self.color is not None:
self.postNotification("Image.ColorChanged", data=notification.data)
if __name__ == "__main__":
import doctest
doctest.testmod()
|